MeasureThat.net

Run results for: WeakMap vs Symbol Property vs String Property

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Chrome 120
Mac OS X 10.15.7
Desktop
one year ago
Test name Executions per second
WeakMap set 11643148.0 Ops/sec
Symbol Property set 12471522.0 Ops/sec
WeakMap get 11771086.0 Ops/sec
Symbol Property get 12468970.0 Ops/sec
String Property set 12397484.0 Ops/sec
String Property get 12486915.0 Ops/sec
Script Preparation code:
AخA
 
var to0 = {};
var to1 = {};
var to2 = {};
var wm = new WeakMap();
var sy = Symbol();
var prop = 'aaa'
wm.set(to1, 1);
to1[sy] = 1;
to2[prop] = 1;
Tests:

  • WeakMap set

     
    wm.set(to0, 1);

  • Symbol Property set

     
    to0[sy] = 1;

  • WeakMap get

     
    let r = wm.get(to1);

  • Symbol Property get

     
    let r = to1[sy];

  • String Property set

     
    to2[prop] = 1;

  • String Property get

     
    let r = to2[prop];